Agitation apparatus and agitation method

a technology of agitation apparatus and agitation method, which is applied in the direction of rotary stirring mixers, manufacturing tools, transportation and packaging, etc., can solve the problems of insufficient mixing, insufficient mixing, and generation of hammers, so as to reduce the adhesion of a substance, and reduce the risk of insufficient mixing
US8485716B2Active Publication Date: 2013-07-16DAINIPPON INK & CHEM INC
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Patents(United States)
Current Assignee / Owner
DAINIPPON INK & CHEM INC
Publication Date
2013-07-16

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Abstract

An agitation apparatus and an agitation method that ensure rapid and homogeneous agitation / mixing of fluids with a wide spectrum of viscosities from low to high levels and fluids with high thixotropy throughout an agitation vessel are provided. In an agitation apparatus, a lowest upper agitation blade is arranged to be vertically adjacent to a lower blade. As viewed from above, a line on a plane connecting a lower end portion of the lowest upper agitation blade to the center of an agitation shaft is arranged by a predetermined angle with respect to the center line of the lower blade in a blade radial direction. As viewed from the side, a horizontal cross section including the lower end portion of the lowest upper agitation blade is located below a horizontal cross section including an upper end portion of the lower blade.
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Description

FIELD OF THE INVENTION

[0001] The present invention relates to an agitation apparatus used in agitation processes for purposes such as mixing, dissolution, crystallization, reaction, distillation, defoaming, solvent removal, emulsification, and particulation.BACKGROUND OF THE INVENTION

[0002] Conventionally, small-sized blades such as turbine blades, paddle blades, and propeller blades are often used as agitation blades of an agitation apparatus to process fluids with low to middle viscosities. To process fluids with middle to high viscosities, anchor blades or helical ribbon blades are often used as the agitation blades.

[0003] However, it has been known that small-sized blades easily produce a flow boundary in an agitation vessel, which not only hampers generation of a vertically circulating flow throughout the vessel but also causes insufficient mixing when fluid with high viscosity is processed. Contrastingly, as has been known, the anchor blades or the ribbon blades cause insufficien...

Claims

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